Any DCS World keys purchased from other sources are invalid and are simply trying to re-sell keys that are bound to other users or purchased through fraud. Such sites include Kinguin, CDExpress and G2A.

If you purchase DCS World keys from these sites, we cannot help you. We suggest you contact these sites for a refund.

However, at the time of the DCS Map (July-August 1944), these sites had been abandoned or destroyed, with the main defence line sited further inland (e.g. there was a FREYA site at Creil).

This is why it is important that the radars are units and static objects, rather than map alterations. This lets the mission builders create sites appropriate to the dateline or the map, or some completely different era (incl. modern), if that's what is needed.

However, at the time of the DCS Map (July-August 1944), these sites had been abandoned or destroyed, with the main defence line sited further inland (e.g. there was a FREYA site at Creil).

This is why it is important that the radars are units and static objects, rather than map alterations. This lets the mission builders create sites appropriate to the dateline or the map, or some completely different era (incl. modern), if that's what is needed.

Indeed, as units. But with 'site' Im more referring to terrain/texture in place, like the naval defence site at Point du Hoc. In general I find Normandy map lacking with those details.

WW2 radar units has been requested a lot of times and not an single response so far.
Functionality doesn't have to been that different from the modern one. Adjustments on detection range / altitude and correct radio calls can be added later. (It's not like much effort has been done in that area anyway)

That would give the game so much more than a other T80 disguised as a WW2 tank. Plus the broken path finding (if existing at all?) on the Normandy map would not even matter.